3.A few cups of green tea each day may help prevent heart disease,Greek researchers said on Wednesday.A study published in the European Journal of Cardiovascular (心血管的) Prevention showed further evidence of the potential health benefits from tea already linked to a reduced risk of a range of cancers and other conditions.
The study showed that green tea improves blood flow and the ability of arteries (動脈) to relax,said Charalambos Vlachopoulos,an expert at the Athens Medical School in Greece who worked on the study.
Other studies have shown that black tea also has benefits for cardiovascular health.
The Greek team said they believed green tea might be even better because it had higher quantities of beneficial substances called flavonoids (類黃酮)-some of which are lost in the oxidation (氧化) process that black tea undergoes.
Flavonoids are also found in cocoa,tomatoes and grapes."A couple of cups a day would probably be good for people,"Vlachopoulos said."This is the first study to show these effects for green tea."
The researchers gave 14healthy volunteers either green tea,coffee or hot water and then measured the function of endothelial cells (內(nèi)皮細胞).These cells help relax arteries and ease blood flow."What is important is these effects are evident within 30minutes,"Vlachopoulos said.
The measurements taken 30,90and 120minutes following consumption showed an almost immediate benefit among people who had drunk green tea,he said.While the researchers looked only at a short-term effect,Vlachopoulos said the team's studies suggest the protection is long-lasting.
"Green tea is consumed less in the Western world than black tea,but it could be more beneficial,"he said.
32.What would be the best title for the passage?B
A.Benefits from Black Tea
B.Green Tea Protects Against Heart Disease
C.Different Kinds of Tea
D.Green Tea Reduces the Risk of Cancer
33.According to the study,green tea can do the following EXCEPTB.
A.improve blood flow
B.increase the oxidation rate of flavonoids
C.help relax arteries
D.benefit cardiovascular health
34.Which of the following statements is TRUE?A
A.Green tea contains more flavonoids than black tea.
B.Green tea is better than black tea because it has been processed.
C.Vlachopoulos's study is based on many years'research.
D.Vlachopoulos's study shows the effects of Green tea are not evident in short time.
35.We can learn from the passage thatD.
A.14volunteers with heart disease joined in the experiment
B.it takes an hour for green tea to take effect
C.Westerners prefer green tea to black tea
D.green tea has a long-lasting effect according to Vlachopoulos.
分析 本文是一篇說明文.本文主要介紹了每天喝幾杯綠茶有助于預防心臟病.
解答 32-35 BBAD
32,答案:B 考查主旨大意.根據(jù)第一段中"A few cups of green tea each day may help prevent heart disease,Greek researchers said on Wednesday."可知,本文主要介紹了每天喝幾杯綠茶有助于預防心臟。蔬xB 項.
33,答案:B 考查細節(jié)理解.根據(jù)第二段中"The study showed that green tea improves blood flow and the ability of arteries (動脈) to relax"及第三段中"Other studies have shown that black tea also has benefits for cardiovascular health."可知,綠茶能夠促進血液流動,并能增強動脈疏通能力,對心血管健康也有好處.故選B項.
34,答案:A考查細節(jié)理解.根據(jù)第四段中"The Greek team said they believed green tea might be even better because it had higher quantities of beneficial substances called flavonoids (類黃酮)-some of which are lost in the oxidation (氧化) process that black tea undergoes."可知,研究人員認為綠茶的心血管保健功效可能會更強,因為綠茶中所含的一種名叫"類黃酮"的有益物質(zhì)較多,而這種物質(zhì)在紅茶氧化過程中會部分流失.故選A項.
35,答案:D 考查細節(jié)理解題.根據(jù)倒數(shù)第二段中"While the researchers looked only at a short-term effect,Vlachopoulos said the team's studies suggest the protection is long-lasting."可知,盡管研究人員只研究了綠茶的短期功效,但Vlachopoulos稱,他們的研究表明這種保護是長期的.故選D項.
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